• 제목/요약/키워드: FED spacer

검색결과 9건 처리시간 0.024초

정전 열 접합을 이용한 FED 스페이서의 초청정 정렬/탑재 공정 개발 (Development of Ultra-Clean Aligning/Mounting Process of FED Spacers using Electrostatic Bonding)

  • 주병권;강문식;이윤희
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제49권11호
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    • pp.635-639
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    • 2000
  • In this paper, a new idea about ultra-clean aligning and mounting method of FED spacers was introduced. The glass-to -glass electrostatic bonding process was employed in order to bond the micro-structures of spacers to black matrix area formed on an FED anode substrate. It is possible to get adhesive-free bonding interface and well-aligned spacer array on an FED anode substrate with a ${\pm}5{\mu}m$ accuracy. Finally, I inch-sized FED panel was demonstrated to make sure of its applicability to FED panel fabrication.

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정전접합을 이용한 고종횡비의 FED용 스페이서 공정 개발 (Development of High Aspect Ratio Spacer Process using Anodic Bonding for FED)

  • 김민수;김관수;문권진;우광제;이남양;박세광
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제49권1호
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    • pp.70-72
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    • 2000
  • In this paper, a spacer process for FED(Field Emission Display) was developed with the glass to glass anodic bonding technology using Al film as an interlayer and a 3.5 inch monochromatic type FED was fabricated. Holder to dislocate spacers vertically was designed with (110) Si wafer by bulk etching. Spacers, $100\mum\; width\; and\; 1000\mum$ height, were formed on anode panel by spacer to glass anodic bonding and the fabricated FED was operated for emission at 1㎸ anode voltage.

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유리-유리 정전접합을 이용한 FED스페이서 기술 개발 (Development of spacer technology using glass to glass anodic bonding for FED)

  • 김민수;박세광;문권진;김관수;우광제;정성재;이남양
    • 한국진공학회지
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    • 제8권4A호
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    • pp.465-469
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    • 1999
  • In this paper, spacer process for FED (Field Emission Display ) was developed with the glass to glass anodic bonding technology using Al film as an interlayer. Characteristics, current density-time curves and force of the anodic boding were measured on various thickness of Al film; 1000$\AA$, 2000$\AA$, 3000$\AA$, 4000$\AA$ and 500$\AA$. Holders for spacer were fabricated with photosensitive glass and (110) Si wafer by bulk micromachining. Spacers was formed on glass substrate by spacer glass to glass anodic bonding and an evacuated panel was fabricated to prove the potential of application for FED.

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고 전압 FED용 Spacer형성 기술 개발 (Development of spacer formation techni4ue for high-voltage FED application)

  • 강문식;주병권;이윤희;유건호;오명환
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 G
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    • pp.3274-3275
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    • 1999
  • This paper presents a new method of spacer assembly using anodic bonding method which is very simple and clean. The spacer having $100{\mu}m(W){\times}2.1{\mu}m(H)$ was bonded on amorphous silicon film of anode plate. Then, the vertical-type electrode was used for assembling of spacer in high voltage field emission display. In these results, we suggested that the vertical-type electrode provided spacer alignment for high aspect ratio and more simple batch process than conventional method.

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A Novel Carbon Nanotube FED Structure and UV-Ozone Treatment

  • Chun, Hyun-Tae;Lee, Dong-Gu
    • Journal of Information Display
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    • 제7권1호
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    • pp.1-6
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    • 2006
  • A 10" carbon nanotube field emission display device was fabricated with a novel structure with a hopping electron spacer (HES) by screen printing technique. HES plays a role of preventing the broadening of electron beams emitted from carbon nanotubes without electrical discharge during operation. The structure of the novel tetrode is composed of carbon nanotube emitters on a cathode electrode, a gate electrode, an extracting electrode coated on the top side of a HES, and an anode. HES contains funnel-shaped holes of which the inner surfaces are coated with MgO. Electrons extracted through the gate are collected inside the funnel-shaped holes. They hop along the hole surface to the top extracting electrode. In this study the effects of the addition of HES on emission characteristics of field emission display were investigated. An active ozone treatment for the complete removal of residues of organic binders in the emitter devices was applied to the field emission display panel as a post-treatment.

Lactobacillus spp의 Salmonella enteritidis KU 101에 대한 보호 효과와 L. casei YIT 9018의 16S-23S rRNA Intergenic Spacer Region 염기배열 특성 (Protective Activities of Lactobacillus casei YIT 9018 against Salmonella enteritidis KU101 and Characteristics of 16S-23S rRNA Intergenic Spacer Region Sequence)

  • 배진성;윤영호
    • Journal of Animal Science and Technology
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    • 제45권3호
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    • pp.473-482
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    • 2003
  • Lactobacillus spp. 급여에 의하여 Salmonella enteritidis 감염에 의한 치사율의 저하 성향, 시험관내 억제활성, 장액 내의 총 IgA 농도변화와 Lactobacillus casei.의 16S-23S rRNA intergenic spacer region의 sequence를 측정 비교한 결과는 다음과 같다. Lactobacillus spp. 5균주는 시험관내 Salmo- nella enteritidis 억제활성 측정 결과 모든 시험균주가 억제활성을 나타내었고 그 억제활성의 차이가 통계적인 유의성을 보였으며, 억제활성의 차이는 L. helveticus CU 631 > L. rhamnosus GG ATCC 53103 > L. johnsonii C-4 > L. acidophilus ATCC 4356 > L. casei YIT 9018 인 것으로 나타났다. Lactobacillus spp. 급여에 의하여 Salmonella enteritidis challenge에 의한 치사율 저하효과는 Lb. helveticus CU 631은 대조구의 생존률 62%에 대하여 100%로서 가장 높은 치사율 저하효과를 나타내었고, L casei YIT 9018, L johnsonii C-4의 생존률이 70%와 50%를 나타내었다. Lactobacillus spp.의 16S-23S rRNA intergenic spacer region의 sequence를 측정하고 gene bank에 등록된 균주의 sequence와 비교한 결과 homology의 차이를 나타내었다.

Penicillin G Amidase생산을 위한 재조합 대장균의 유가배양에 관한 연구 (Fed-batch Culture of Recombinant E.coli for the Production of Penicillin G Amidase)

  • 이상만
    • 한국미생물·생명공학회지
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    • 제36권4호
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    • pp.314-319
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    • 2008
  • Penicillin G amidase(PGA, benzylpenicillinamidohydrolase, EC 3.5.1.11)는 penicillin G를 phenylacetic acid(PAA)와 6-aminopenicillanic acid(6-APA)로 분해하는 효소이다. Escherichia coli(E. coli) ATCC 11105의 PGA는 24 kDa의 small subunit과 65 kDa의 large subunit으로 구성되어 있고, precursor polypeptide에서 signal peptide와 spacer peptide가 절단되어 활성을 가진 heterodimer가 형성된다. 본 연구에서는 E. coli ATCC 11105에서 PCR(polymerase chain reaction)을 통해 증폭한 pga gene을 expression vector에 넣어 pET-pga plasmid를 제작하였고, 이것을 E. coli BL21 (DE3) 균주에 형질 전환하여 PGA를 발현하고 그 활성을 분석하였다. E. coli BL21(DE3)/pET-pga 균주의 고밀도 배양액을 SDS-PAGE로 분석 했을 때, PGA의 precursor, large subunit, 그리고 small subunit으로 보이는 protein band가 나타났으며, PGA가 soluble form의 precursor로 발현되어 processing을 거쳐서 large subunit과 small subunit으로 절단되기도 하고, 일부는 insoluble form의 precursor로 발현되기도 하는 것으로 생각된다. 유가배양시 온도변화 전략을 사용하여 고농도 배양에서 발현을 유도하였다. 온도변화 전략은 $37^{\circ}C$에서 $28^{\circ}C$를 거쳐 $22^{\circ}C$로 3단계로 변화시켰다. 이러한 전략으로 PGA활성은 19.6 U/mL이며 균체량은 600 nm에서 흡광도가 62까지 도달하였다.